# Practice Questions on Permutation-CombinationAptitude Questions and Answers

## Easy Permutation-Combination Question - 16

 Q16. $12$ chairs are arranged in a row and are numbered $1$ to $12$. $4$ men have to be seated in these chairs so that the chairs numbered $1$ ans$8$ should be occupied and no two men occupy adjacent chairs. Find the number of ways the task can be done.
 A. $360$ B. $384$ C. $432$ D. $470$

## Easy Permutation-Combination Question - 17

 Q17. How many words can be formed by re-arranging the letters of the word $ASCENT$ such that $A$ and $T$ occupy the first and last position respectively?
 A. $5!$ B. $4!$ C. $6! – 2!$ D. $6!/2!$

## Easy Permutation-Combination Question - 18

 Q18. If ${^6P_r} = 360$ and ${^6C_r} = 15$ find $r$?
 A. $3$ B. $4$ C. $5$ D. $6$

## Easy Permutation-Combination Question - 19

 Q19. In how many ways can six different rings be worn on four fingers of one hand?
 A. 10 B. 12 C. 15 D. 16

## Easy Permutation-Combination Question - 20

 Q20. There are $12$ yes or no questions. How many ways can these be answered?
 A. $4096$ B. $2048$ C. $1024$ D. $144$
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